Instance shadow detection [1]}, [2]}, [3]} suggests finding the shadows together with the associated objects in images to support
photo-editing applications and light direction estimation.
With the explosive growth of videos on the Internet,
the demand for video editing is enormous.
However, existing approaches [1]}, [2]}, [3]} provide mainly image-level editing, making it hard to allow easy-to-use and good-quality video editing due to the lack of considering the temporal dimension and also the shadow-object tracking.
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